Overview

Input-output data

Realization: Az, Bz, Cz, D

Complex modes at sensor locations

(disp-velocity form)

Classical Damping

Non-classical Damping

• Undamped modes, frequencies & damping ratios

• Mass-normalization constants

• Modal contribution to the inverse of the system matrices: m-1,c-1,k-1

• The difficulty lies in extracting the undamped modes and frequencies from the damped properties.

• Approximations are necessary unless the basis is complete

Module 1

Module 2

Module 3

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